Squeeze juice from oranges. Measure juice, adding water if needed to make 1 cup; set aside.
Remove white pith from one-half of orange peel. Cut peel into thin slivers. Combine orange peel, orange juice, dried chili peppers and rhubarb in a large saucepan. Simmer covered about 3 minutes, or until rhubarb is tender. Stir in classic pectin. Bring to a boil. Add sugar, stirring until dissolved. Return to a rolling boil. Boil hard 1 minute, stirring constantly. Remove from heat. Remove dried chili peppers and discard. Skim foam if necessary.
Ladle hot jam into hot jars, leaving a 1/4 inch headspace. Adjust two-piece caps.